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dezoksy [38]
3 years ago
13

2 Points

Physics
2 answers:
DochEvi [55]3 years ago
8 0

Answer:

For me I thinks is B

Irina-Kira [14]3 years ago
7 0

Answer: 7.6

Explanation:

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This is a sience question
levacccp [35]
I would say A is the answer im not sure tho
3 0
3 years ago
Read 2 more answers
The force exerted by an electric charge at the origin on a charged particle at a point (x, y, z) with position vector r = x, y,
kap26 [50]

W = K[ {\frac{1}{3} - \frac{1}{\sqrt{38} }  ]

<u>Explanation:</u>

The parametric representation of a line segment joining the points (a,b,c) and (l,m,n) is

r(t) = (1-t) . (a,b,c) + t . (l, m, n)  where t ∈ |0, 1|

So, the parametric representation of a line segment joining the points (3,0,0) and (3,2,5) is

r(t) = (1 - t) . (3,0,0) + t . (3,2,5)  where t ∈ |0, 1|

r(t) = (3(1 - t), 0, 0) + (3t, 2t, 5t)  where t ∈ |0, 1|

r(t) = (3, 2t, 5t)

Given:

F(x, y, z) = \frac{Kr}{|r|^3} \\\\F(x, y, z) = \frac{K}{(x^2 + y^2 + z^2)^3^/^2}  (x, y, z)\\\\F(r(t)) = \frac{K}{(3^2 + (2t)^2 + (5t)^2)^3^/^2}  (3, 2t, 5t)\\\\F(r(t)) = \frac{K}{(9 + 29t^2)^3^/^2} (3, 2t, 5t)

dr = (0, 2, 5) dt

Work = \int\limits^1_0 {F} \, dr

W = \int\limits^1_0 {\frac{K}{(9 + 29t^2)^3^/^2} } (3, 2t, 5t) . (0, 2, 5)\, dt\\ \\    = \int\limits^1_0 {\frac{K ( 4t + 25t)}{(9 + 29t^2)^3^/^2} } \, dt\\\\\\

W = \frac{1}{2}\int\limits^1_0 {\frac{K(29t)}{(9 + 29t^2)^3^/^2} } \, dt \\ \\

Substitute = 9 + 29t² = u, 92tdt = du

Limit changes from 0→1 to 9 → 38

W = \frac{K}{2} \int\limits^3_9 {\frac{du}{u^3^/^2} } \,\\\\

On solving this, we get:

W = K[ {\frac{1}{3} - \frac{1}{\sqrt{38} }  ]

Therefore, work done is W = K[ {\frac{1}{3} - \frac{1}{\sqrt{38} }  ]

5 0
3 years ago
a bucket filled with water has a weight of 150 N and is attached to a rope that is woud around a pully (solid disc) with a 0.5m
maria [59]

Answer:

20 rad/s^{2}

Explanation:

weight / force (F) = 150 N

radius (r) = 0.5 m

mass (m) = 15 kg

angular acceleration = tangential acceleration / radius

where

  • tangential acceleration = force/ mass = 150/15 = 10 m/s^{2}
  • substituting the above into the equation for angular acceleration we have

angular acceleration =  10 / 0.5 = 20 rad/s^{2}

5 0
3 years ago
What is a magnetic disc that provides long-term storage for programs and data?
kap26 [50]

Answer:

The correct answer is: A HARD DISK

Explanation:

Magnetic Disc stores data of different types and formats that can always be edited or erased at any time. An example of a Magnetic Disc is a Hard Disk.

A hard disk is a type of magnetic storage device inside a computer that store data magnetically usually for the long-term and it could store a large volume of data, though that depends on the size, because it comes in various size. However, it generally allows stored data to be retrieved easily.

6 0
3 years ago
Define: primary and secondary coils
Hoochie [10]
<em><u>Primary coil:</u></em><em><u /></em><u />
It is the part of electric circuit in which input voltage is applied,,and it induces current in neighbouring secondary coil...
<em><u>Secondary coil:</u></em><em><u /></em><u />
It is the coil in which current is induced by primary coil...
6 0
3 years ago
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